The correct option is D The used verb form is wrong; the correct verb form is - has been raining
Present perfect continuous tense is used to express that an action started in past, continued to the present time and will / may continue in the future as well. The rain started in the past, continued till the present, and may continue in the future. Hence, we will use the present perfect continuous tense here. The syntax for present perfect continuous tense is: has / have + been + verb + ing. Therefore, the correct answer is: has been raining.