Oxidation unit test Please help ASAP.

Which phrase best defines a redox reaction? (1 point)
O a reaction in which oxygen combines with different atoms
O a reaction in which electrons are transferred between different atoms
O a reaction in which electrons are released from the system
O a reaction in which the number of oxygen atoms is reduced

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

Rn in the right answer