Correct option is D
The correct identification of the error is in option (d), "She hang up."
The error is in the verb form; the correct form should be "She hangs up."
The verb "hang" needs to agree with the third-person singular subject "She" by adding -s in the simple present tense for habitual actions.
Grammatical rule used: Subject–verb agreement in the simple present tense for third-person singular subjects.
Example: He always hangs up his coat by the door when he comes home.