Select the letter of the sentence that is most accurate using the proper rules of English grammar and MLA style. Group of answer choices a. The dogs who are training to be service dogs learn how to be protective and alert companions and are also groomed to be calm and gentle. b. The dogs who are training to be service dogs learns how to be protective and alert companions and is also groomed to be calm and gentle. c. The dogs whom are training to be service dogs learn how to be protective and alert companions, and are also groomed to be calm and gentle. d. The dogs who are training to be service dogs learn how to be protective and alert companions, and it is also groomed to be calm and gentle