Question

which sentence uses parallel structure correctly? ada lovelace not only envisioned the potential of computers to perform tasks beyond mere calculation, but also wrote the first algorithm designed to be implemented by a machine. ada lovelace not only envisioned the potential of computers to perform tasks beyond mere calculation, but also the first algorithm designed to be implemented by a machine was written by her. ada lovelace was not only interested in the potential of computers to perform tasks beyond mere calculation, the first algorithm designed to be implemented by a machine was originally hers too. ada lovelace was not only interested in the potential of computers to perform tasks beyond mere calculation, the first algorithm designed to be implemented by a machine was also written by her.

Explanation:

To determine the correct sentence with parallel structure, we analyze the "not only...but also..." construction. In a parallel structure, the parts after "not only" and "but also" should be grammatically consistent (same verb form, subject - verb agreement, etc.).

• For the first option: "Ada Lovelace not only envisioned... but also wrote...". Here, "envisioned" (past tense, active verb) and "wrote" (past tense, active verb) are parallel. The subject "Ada Lovelace" is consistent for both verbs.
• For the second option: "Ada Lovelace not only envisioned... but also was written...". The first part has an active verb ("envisioned") and the second part has a passive verb ("was written") with a different subject implication (the algorithm was written, not Ada doing the writing in the second part's structure), so it is not parallel.
• For the third option: The structure is broken. It starts with "was not only interested..." and then introduces a new independent clause "the first algorithm... was originally hers too" which does not follow the "not only...but also..." parallel structure.
• For the fourth option: It has two independent clauses "Ada Lovelace was not only interested..." and "the first algorithm... was also written by her" which do not follow the "not only...but also..." parallel structure within a single clause.

Answer:

A. Ada Lovelace not only envisioned the potential of computers to perform tasks beyond mere calculation, but also wrote the first algorithm designed to be implemented by a machine.