Question

Fill in the blank with the most appropriate option:

It's ____ powder I have ever used.

• A. good
• B. better
• C. the best
• D. best

Answer 1

The correct option is C the best

The Superlative Degree denotes the existence of the highest degree of the quality. It is used when more than two things are compared.
'The' is used as an emphasising adjective to express the quality of the noun.
Hence Option C is correct.
'Better' is comparative form. Thus Option B is incorrect.
'Good' is the positive form so option A is incorrect.
As ever is used in the sentence use of determiner 'the' is necessary.
Hence option D is incorrect.