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

How to choose exercise machines for chronic hip pain
Select machines that offer low-impact exercise options.
Exercise can be beneficial for hip pain, but it is important to do exercises that are low-impact. These exercises are less likely to agitate your hips and lead to more hip pain.

Available options:
[a]. For example, if you are considering getting a stair machine, then it would be important to make sure that the machine has a low-impact setting, such as shorter strides and gentle steps. Choose a machine with low resistance settings..
[b]. Incorporate yoga and tai chi into your daily routine. Yoga and tai chi both help to promote flexibility..
[c]. Walking and running strengthen the rest of your body, which will prevent future back pain. Low impact exercises such as swimming or biking improve stability in particular..
[d]. Avoid losing weight or trying to reshape your hips, as these will only agitate your hip, rather than stabilize it. Try a combination of low impact and strength exercise each day..
[a].