Multi-choice problem: Continue writing the next sentence in this paragraph:

How to worm chickens
Check chicken droppings for signs of worms.
Many types of worms show up in the feces. Others create dirty or poopy eggs.

Available choices:
[a]. Identify any " dead " or " young " of a bird by looking for yellow, brown, and white feces on its droppings. If your bird has yellowed its feathers, droppings, or moist spots, it may be weaned and then have a hard time thriving..
[b]. Look for any droppings that look like another chicken's droppings. As soon as you see a foul smell coming from the feces, wipe it away immediately with a paper towel or rag..
[c]. Make sure to buy a small sack of shredded chicken feed, if you can find it at your local feed store. Rather than a large sack of shredded chicken feed, get a pre-made sack..
[d]. If only some of your chickens seem to have worms, it is still likely that they will give the worms to the other chickens, so it is a good idea to treat the whole flock. Send the feces to a veterinarian if your chickens are losing weight or having other problems and you don't see signs of worms in their feces..
[d].