Question

in 1899, swedish chemist svante arrhenius developed an equation to answer a long - standing question: why do chemical reactions speed up at higher temperatures? the arrhenius equation, named for its creator, ______ an important concept in modern chemistry. which choice completes the text so that it conforms to the conventions of standard english? choose 1 answer: a remains b remain c have remained d are remaining

Explanation:

The subject of the sentence is "the Arrhenius equation", a singular noun phrase. It requires a singular present tense verb to agree, as the statement describes an ongoing, current fact about the equation's status in chemistry. "Remains" is the correct singular present tense form; "remain" is plural, "have remained" is present perfect (unnecessary here as no time-based completion is implied), and "are remaining" is an incorrect continuous form for this stative verb.

Answer:

A. remains