In which sentence is the adjective clause punctuated correctly
the poem, which was written in one night, tells a bleak story
the poem, that was written in one night tells a bleak story
the poem, tells which was written in one night tells a bleak story.
the poem tells a bleak story, which was written in one night

The poem, which was written in one night, tells a bleak story.

Here we have to keep in mind specific criteria, for the question is to determinate if the adjective clause results essential or nonessential.Anytime, you must decide if the adjective clause is essential or nonessential and then add or omit commas accordingly. Non Essential clauses do require commas.

Then, we move further to decide, according to these criteria, the need or absence of commas. IF written as... The poem tells a bleak story. The clause would turn to be nonessential since we could perfectly erase it and still the sentence could proceed. Whereas as a matter of fact the detail is then added (which was written in one night) and turns, therefore, to be nonessential.

Remember, to properly punctuate an adjective clause correctly. Added is an image to help:

the african society basically suffered the consequences of colonization and apartheid directly attacking the black people, first, during the colonialism and its main idea which which "white people" had better rights, affecting   them principally in the right to establish black people in their territories, access to quality education and health services and took away any civil right even to the black people to feel they have the same opportunities as the settlers.

it means that people are present over there who cares for us who loves us and we are never alone there is always a supporting hands behind us so never lose your hope and confidently move ahead to get success in your life.if you make mistakes there are people to make it correct