Which sentences from the passage develop the central idea that prices vary over time as well as from place to place? Select each correct answer.

"Even with different tax costs, however, sometimes the difference in price between two places is hard to explain."

"Slowly but surely, the demand for cheaper garden hoses is spreading throughout Germany, and the phrase “getting hosed” no longer has two meanings."

"In the United States, states need to make money to help pay for the services they provide."

"If you go to a store in the United States to buy a garden hose, the prices will also vary, but the parts will probably come attached."

"As more people gain Internet access, they’re researching item prices in other countries."

In the United States, states need to make money to help pay for the services they provide."Even with different tax costs, however, sometimes the difference in price between two places is hard to explain."If you go to a store in the United States to buy a garden hose, the prices will also vary

Explanation:

These sentences explain the central idea that the prices vary over time and it provides the evidence to back it up.

a complex sentence consists of an independent clause and one or more dependent clauses.  

to write complex sentences, we must use subordinating conjunctions.  

all the complex sentences begin with a subordinating conjunction and when it occurs, a comma must be place at the end of the dependent clause. on the contrary, if the sentence begins with an independent clause, then no comma is used.

after  

although  

as  

because  

before  

if  

since  

when  

for example,  

after she won the competition, she became very popular.  

although my father was hurt, he continued fighting for his rights.  

as all of you got a ten, you will be able to leave early today.  

before he went to the war, he asked his parents to bless him.  

if it is cold, i won’t go out.  

since you didn’t bring the homework, you will get low grades.  

when it is hot in the town, everyone goes to the beach.