Which sentence uses a verb that agrees with its subject?

a.
the termites in that nest feed the queen.

b.
a tree beside the flowers have sprouted new buds.

c.
a pile of old clothes were dumped in the basement.

d.
their conversation during the concert were quite rude.

b

explanation:

there are number of topics. you can pick any one of these topics:

the answer is: the start of world war i, and russia’s hopes of benefiting from it

during world war i russian joined due to in their current crisis they were being supported by france and the war was already declared to them by germany, they needed to maintain their political goal and leadership role in the balkans, and is the same feeling that this excerpt evoke the eager of maintain the land value.