Jumble letter can you help me plsss​

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

What is the compliment dna strand to the following sequence: ttgactaggcta

Wich is not standing in the way of astronomers getting a good view of different star