Question

place the missing punctuation into the sentence. if the sentence is correct, leave it as is. the road to becoming president would be a long arduous one, but tesoro was determined.

Explanation:

The words "long" and "arduous" are adjectives describing "one" (referring to the road). They are coordinate adjectives, so a comma should be placed between them to separate and clarify their description.

Answer:

The road to becoming president would be a long, arduous one, but Tesoro was determined.