Which sentence contains an adverb clause?

a.
the state of california is also called the golden state.

b.
when you return from california, take a taxicab from the airport.

c.
yosemite national park, in central california, covers nearly 1,200 miles of mountainous terrain.

d.
california has three of the top ten most populated cities in the united states.

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.