When did people first use plastic bottles for soft drinks? ...

[ Grammar ]

When did people first use plastic bottles for soft drinks? This question in Passive Voice is:

A. When was plastic bottles first used for soft drinks?

B. When were plastic bottles first used for soft drinks?

C. When did plastic bottles were first used for soft drinks?

D. When had plastic bottles been first used for soft drinks?

Select your answer:
A B C D E

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