Which of the following is the most relevant rebuttal to the counterclaim? a. even though they cannot prove the case for cancer yet, is being glued to a radioactive device 24 hours a day really smart? b. while the data from medical research hasn't proven anything conclusively, an increasing number of studies indicate that there is a significant risk. c. cell phones are not a necessity, so people could learn to moderate use in case their health is at risk. d. medical research usually takes a long time before it proves anything.

B. While the data from medical research hasn't proven anything conclusively, an increasing number of studies indicate that there is a significant risk.

This sentence is being used as a rebuttal to a counterclaim. The counterclaim argues that the data from medical research has not proven anything conclusively. The author is addressing this concern, and acepting the truth of the statement. However, he also states that although nothing conclusive has been proven, an increasing number of studies indicate that there is a significant risk. This is an effective response to the counterclaim.

can i see the painting?

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.