Question

new and interesting research conducted by suleiman a. al - sweedan and moath alhaj is inspired by their observation that though studies of the effect of high altitude on blood chemistry are --, the effect on blood chemistry of living in locations below sea level, such as the california towns of niland and thermal, has received comparatively little notice. which choice completes the text with the most logical and precise word or phrase? a preliminary b sporadic c equivocal d copious

Explanation:

The sentence implies that the research on the effect of high - altitude on blood chemistry in certain locations has received little attention. "Sporadic" means occurring at irregular intervals or only in a few places, which best fits the context as it suggests that the research is not widespread or comprehensive. "Preliminary" means initial, which doesn't relate to the scarcity of attention. "Equivocal" means ambiguous, not relevant here. "Copious" means abundant, which is the opposite of what the sentence implies.

Answer:

B. sporadic