In what way can you determine whether to use who or whom in a relative clause? select all that apply.

a. whom is used as a subject.
b. who is used as a subject.
c. whom is used as an object.
d. who is used as an object

Option B and C

Explanation:

In case of relative clause , the object and subject of the sentence is determined by looking at the state of the verb.

The best and easiest way to do so is by asking questions with respect to the verb

a) The answer obtained in lieu to the question asked as "who" is doing the action defined by the verb in any sentence is the subject of the sentence

b)The answer obtained in lieu to the question asked as upon "whom" is this action being done as defined by the verb in any sentence is the object of the sentence

 Hence, option B and C are correct

c. live where it’s cold and icy

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.