Evidence in an argument consists of

A.) formatting to support the counterclaim

B.) reason the claim is true

C.) fallacies of the reasoning

D.) formal data explaining the experiment

Evidence in an argument that consists of reason that claim that the particular argument is true.

Explanation:

In order to prove a fact is true we need to have the appropriate evidence.

For example:

If we say that the earth is round then we need to have sufficient data / reasons to prove the claim (i. e. earth is round) to be true

Another example is that if we claim that sun is the planet that provides us sunlight then we need to have proper evidence in place that prove that this fact is true.

Considering other option given in question like

formal data explaining the experiment:No experiment is conducted, evidence is required to analyse the truthiness of a fact and not an experiment. Evidence is not a counter claim rather is a claim that is based on true facts

So we can say that Evidence in an argument consists of reason the claim is true.