Hi mukherjee.tanuj3,
This SC is based on 2 major grammar rules:
1) Verbs - The sentence begins "In her earlier poems, Phyllis Wheatley's BLENDING......"; the answers give us 2 choices: "suggests" and "suggesting." The correct very is "suggests" ("...Wheatley's blending... suggests her range and depth...." Eliminate A and E.
2) Parallelism - The sentence includes a 3-item list. All 3 items must be in parallel format. The first item ("solar imagery") and second item ("J-C though and figures") implies that all 3 items must be nouns (and nothing else). Eliminate B and C.
Final Answer: D
GMAT assassins aren't born, they're made,
Rich