This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to give atenolol to cats with heart disease
Notice heart disease symptoms.
In many instances cats will not show signs of heart disease until it has become severe. If you notice your cat struggling to breathe or their mobility suddenly becomes restricted, they may be suffering from heart disease.

Available options:
(a). For example, if your cat is urinating, and you see blood in its stool, the vet might suggest that they have heart disease. Call the vet if your cat exhibits a sudden or prolonged loss of function that warrants seeing a vet.;
(b). If these symptoms occur, you should visit your vet immediately. Other symptoms of heart disease in cats include : Lethargy loss of appetite blue gums or tongue collapse or sudden death Visit your veterinarian.;
(c). Cats with heart disease may also be blind or deaf. If you notice that your cat is not paying attention to you or seems unable to move or be still and uninterested in play or grazing, they may be suffering from heart disease.;
(d). If this is the case, it is best to find a veterinarian. The vet may recommend medication to correct signs of heart disease.;
The answer is:
(b).