Ihave stiff musles all the time even when not doing anything

That prolly means you need to work your muscles more often

Stretching will help with stiff muscles
Eat plenty of fruits and vegetables
You're sore because you haven't used your muscular system

Ithink its part b hope that

Depends on which disease, but as a general rule eat healthy. many vegetables.                                                        hope my answer has come to your . you for posting your question here in we hope to answer more of your questions and inquiries soon. have a nice day ahead! : )     (p.s mark as brainliest if )