While taking the time to conduct market surveys and generating advance hype is necessary, your marketing efforts need to begin much earlier and should start with a clear definition of what specific consumer want or need your product or service satisfies.
the parallel elements are :
"
to conduct and to generate"we can eliminate options A/B and C for violating the parallelism error
(A) While taking the time to conduct market surveys and
generating advance hype is necessary,- parallelism error
(B)While taking the time to conduct marketing surveys and
generating advance hype is necessary,-parallelism error
(C)While taking the time to conduct marketing surveying and
generating advance hype is necessary,-parallelism error
(D)Taking the time to conduct market surveys and to generate advance hype is necessary,
we need to use "while" to join to clauses!!--
option D has a construction error(E)
While taking the time
to conduct market surveys and
to generate advance hype is necessary,--
correct!