Write the next sentence in the following story.

How to walk two dogs
Take one dog for the loose leash walk at a time.
You want to train each dog to obey the leash pull signal first before getting them together.
Remember to carry necessary supplies with you as you would for any dog walk such as the leash, water, poop scoop, and disposal bag.

Pick from:
[a]. Separate the dog from the one on the loose leash. Once you've given the dog the leash, one of your dogs should walk a short distance with their loose leash in tow.;
[b]. Use the leash to signal your dog to you. After getting them more socialized and teaching them leash pull, put the loose leash on each one of them.;
[c]. Typically, you should walk up front with your dog. This won't be as easy when walking two dogs at once, but will be better for the training phase.;
[d]. The leash needs to be able to be adjusted to your dog's expected leash walking routine. Dogs may prefer the slower routes due to weight accumulation.;. The answer should be
[c].