Step 1: Analyze the Phrase
The phrase "Being of crucial importance" means something that is essential or key to the success or development of something.
Step 2: Evaluate the Options
- (a) Strategy: Refers to a plan or method, but it does not mean "crucial importance." ❌
- (b) Confounded: Means confused or perplexed, which is unrelated to the meaning of "crucial importance." ❌
- (c) Inexplicable: Means something that cannot be explained, which does not fit the meaning of "crucial importance." ❌
- (d) Pivotal: Means "of crucial importance in relation to the development or success of something," which is the exact meaning of the phrase. ✅
Step 3: Final Answer
The correct answer is (d) Pivotal.