Question

a team led by portuguese researcher isabel c.f.r. ferreira found that many species of mushrooms contain chemicals called phenolic compounds, such as 5 - o - caffeoylquinic acid and kaempferol. ferreira detected 5 - o - caffeoylquinic acid in pleurotus ostreatus mushrooms and kaempferol in sparassis crispa mushrooms. which choice completes the text with the most logical transition? a however, b for this reason, c for example, d nevertheless,

Explanation:

The text first states a general finding about many mushroom species containing certain chemicals. Then it gives specific examples of mushrooms (Pleurotus ostreatus, Sparassis crispa) and the chemicals (5 - O - caffeoylquinic acid, kaempferol) found in them. "For example" is used to introduce these specific cases. "However" implies a contrast which isn't present here. "For this reason" would imply a cause - effect relationship which isn't applicable either. "Nevertheless" also implies a contrast. So "For example" is the most logical transition.

Answer:

C. For example,