In the following question, a sentence is given with a part in bold. The given phrase in bold may contain an error. The options following can replace the incorrect phrase. The correct phrase that is to be replaced will be your answer. If the sentence is correct as it is, then select ‘No improvement required’ as the answer.

It was evident that the team needed to refined it’s strategy for the better in order to overcome the challenges ahead.

The correct option is refine its strategy to be better.

Let us analyze the grammatical errors present in the bold phrase of the given sentence:

1. Use of the Infinitive Form:
The structural phrase "needed to" must be followed by the base form of the verb (infinitive verb, i.e., "to + V1"). In the original sentence, "to refined" uses the past tense form ("refined"), which is grammatically incorrect. It should be changed to the base form "to refine".

2. Possessive Pronoun vs. Contraction:
"it's" is a contraction for "it is" or "it has". The possessive form indicating ownership or belonging to "the team" (a singular collective noun) is "its" (without an apostrophe). Therefore, "it’s strategy" is incorrect and should be corrected to "its strategy".

3. Idiomatic Preposition / Phrase Structure:
The phrase "for the better" is unidiomatic in this context. The intended meaning is to improve or make the strategy better. Thus, using the infinitive phrase "to be better" correctly expresses the purpose/goal of refining the strategy.

Combining all these corrections, the accurate phrase is "refine its strategy to be better".

Corrected Sentence:
"It was evident that the team needed to refine its strategy to be better in order to overcome the challenges ahead."