Choose the answer that uses a parallel structure to complete the sentence.
while researching for his book, the author traveled to europe, conducted studies,
a. and will begin interviewing hundreds of experts.
b. and interviewed hundreds of experts.
c. igor stravinsky, who was a russian composer during the twentieth century, wrote the musical piece the rites of spring; it
is one of the most recorded works of the 1900s and is said to have inspired many of the century's most prominent
composers.