Answer :

Explanation:

which hypothesis predicts the presence of a cohort effect?

Answer:

"The correct answer is option 1, i.e., friendly.

The passage states that an 'amicable' collaboration helped the Curies.

Amicable means friendly, co-operative."

Explanation:

in addition

"Meanings of the given words:

Friendly- kind and pleasant.

Competitive- relating to or characterized by competition.

Courteous- polite, respectful, or considerate in manner.

Industrious- diligent and hard-working.

Out of these, only friendly can be appropriate here contextually"

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