Problem: Here is a premise:
The cover story attributes teen-agers' mercurial behavior to underdeveloped brains.

Here is a hypothesis:
Underdeveloped brains might be the reason behind teenagers' behavior.

Here are the options:

Answer: yes

Problem: Here is a premise:
The local hero, called Joaqu?n Vara de Rey, was a Spanish general who died defending the colony of Cuba against the Americans in the war of 1898.

Here is a hypothesis:
A Spanish general perished in the defence of Cuba.

Here are the options:

Answer: yes

Problem: Here is a premise:
It had been three parts full.

Here is a hypothesis:
The bottle had only been slightly used before.

Here are the options:

Answer: it is not possible to tell

Problem: Here is a premise:
News fiddles with its rankings to improve newsstand sales.

Here is a hypothesis:
News tempers with its ranking, to boost newsstand sales.

Here are the options:

Answer:
yes