Shreyaa21 wrote:
I am confused between A and E. I found both to be grammatically correct. But I chose E. If we can drop 'that was' (on building the infrastructure needed..), then why can't we drop 'that were' (mining industrial metals.. needed to build). Please clarify.
E is wrong because of the wrong usage of idiom "need + for gerund"(need for carrying ). The correct usage is "need + infinitive" (need to carry . In general, to express purpose, an infinitive is preferred.
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