Which quotation from the answer choices below demonstrates the use of commas with a nonessential element? a. Each time they caught a glimpse of an animal, Jan's mom would lower her voice while they watched for the animal to come into view. b. Then, just ahead, a deer and her baby, called a fawn, cautiously stepped right onto the trail in front of Jan and her mom. c. While the mother deer stopped and stated at Jan and her mom, she also was making sure her baby was safe. d. "Stay back here, Jan," she said quietly.