Question

abstract has the same or almost the same meaning as: conceptual ingenuous concurrent inauthentic

Explanation:

"Abstract" refers to ideas or concepts that are theoretical and not concrete. "Conceptual" also pertains to concepts and ideas, being in the realm of the theoretical rather than the physical. The other words have different meanings: "ingenuous" means innocent or naive, "concurrent" means happening at the same time, and "inauthentic" means not genuine.

Answer:

A. conceptual