Answer quick!

which statement about the black death that struck europe in the fourteenth century is correct?

a. the plague left great britain more powerful than any other country because the plague did not spread to there.

b. feudal lords gained greater control over the serfs who depended on them.

c. most europeans turned away from religion when their prayers did no good in stopping the disease.

d. the effects of the plague on europe encouraged scholars to study medicine and natural science.