A - Although he denies them, Dr. Vasequez faced several scandals last year.
A complex sentences must have both a dependent clasuse (although he denies them) and an independent clause (Dr. Vasquez faced several scandals last year.
Options B and D are compound sentences (two independent clauses) and option C is a simple sentence.
The claim that author make about materials available on internet is the information is exclusive and provides an in-depth analysis of a topic.
Answer: Option (A) is correct
<u>Explanation:</u>
As per the author, the information available on the internet is exclusive. It gives us a detailed analysis of any topic. Today the internet is widely used for searching for information on various topics worldwide.
A large amount of information can be obtained from the internet and that is very useful in research also. Information on the internet is quickly accessible. If we are looking for detail of any subject then internet is the best.
Marry Shelly who wrote the gothic novel of Frankenstein