What is the sentence of benign?

My quarry is rather less benign. They are very common, entirely benign and harmless. His kind of Anglicanism is benign and pretty harmless. The benign economic conditions now prevailing in the world could not last, he said.

Explanation:

chordata is the answer

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.