Answered by AI, Verified by Human Experts
Answer:optionbis correct .His time running this half marathon wasabysmalcompared to his past performances .Explanation:The wordAbysmalis used as an adjective which meansimmeasurably low or wretched , extremely poor or bad.In this question , his present performance is compared to his previous performance in the marathon so the correct word or adjective which can be used isAbysmal.option a which is ,detrimentalwhich meanstending to cause harmdoesn't bring out the correct meaning and option c i.e.perturbwhich meansmake someone anxiousand option drepugnantmeansextremely distateful. Abysmalis used when a comparison has to be drawn....