The director was uncertain __ the team would be able ...

Topics: Grammar for TOEFL

The director was uncertain __ the team would be able to complete the project before the deadline, considering the unexpected challenges they faced during the development phase.*

A. why the team was so determined to push forward,

B. because the team was known for its efficiency,

C. whether

D. although they had managed to overcome similar issues in the past,
overcome similar issues in the past,

Select your answer:

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