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heshamelaziry wrote:Economical means efficient or inexpensive, but not in the context of this sentence

Can you please elaborate heshamelaziry?.
Do you mean to say A) is correct?.how?.

Why we shouldnt chose an answer option with "economical"? .

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caterpillars - economic and economical..

Though caterpillars transform large amounts of plant matter into animal tissue and wastes, and therefore hold an important place in the food chain, they are so voracious that they have become an economic threat to farmers whose crops they eat. a)they are voracious that they they have become an econo...

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Simple past or present perfect for "recent" event.

At a recent conference, the Transit Authority has stated that the provisions in the clean air act fail to promote mass transit as an alternative to private transportation. A)has stated that the provision in the Clean Air Act fail b)stated that the provisions of the Clean Air Act fail c)has stated th...

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A majority of the international journalists surveyed view nuclear power stations as unsafe at present but that they will, or could, be made sufficiently safe in the future. (A) that they will, or could, (B) that they would, or could, (C) they will be or could (D) think that they will be or could (E...

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my bad..i understood my mistake.
only if the bad intention results in real harm,does it qualify as a bad moral act.
Since a didnt cause real harm,it cannot qualify.

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past prediction - would?

i chose e) (my initial choice was d)

isnt this case of past prediction?. if we predict from the past 'would' is required, am i correct?.

Please tell me where i am going wrong.