Answer: B) kristoff worked hard on his diet, but he could not resisted snacking.
Step-by-step explanation: The tense of a verb tells you when a person did something or when something existed or happened. In English, there are three main tenses: the present, the past, and the future. A verb tense shift error occurs when the times of the verbs used in a sentence or paragraph are not consistent. From the given options, the one that has a verbe tense shift error is option B, because after the verb in past form "could" it can't be another verb in past, the correct sentence would be: "kristoff worked hard on his diet, but he could not resist snacking."