Which states the central idea of the passage?
lee and grant were career soldiers who demonstrated exceptional
military leadership during the civil war.
lee and grant fought on opposing sides of the civil war but did
not feel any animosity toward one another.
insufficient primary source accounts make it difficult to develop
accurate pictures of lee and grant.
modern depictions of lee and grant discount their similarities and
the historical contexts of their actions.

the answer should be a)directions.

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.  

what can i you with?