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

the answer to your question is slate

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.