Which of the following is a common precaution for people with known health issues?

a. avoid exercising alone
b. loosen stiff joints before exercise
c. check blood sugar levels often
d. avoid high-impact activities

Zoom out so that you can see the whole state of california. select the ruler tool again, but change the type of measurement from line to path. create a path from san francisco to las vegas, to los angeles, to san diego. what is the total length of this path in kilometers and in meters?