<span>Sandra should give her workout more variety by either altering the exercises, intensity, or volume of work
</span>
Not 100% sure but I'd go with A(:
Hi !
The distinction between an accident and a risky behavior
An accident may be caused by something , someone else than you. You're not responsible for what happened. A car may have hurt you, you may have fallen and break your legs.....and you may be hurt by someone who has risky behaviours.
People having risky behaviours are aware of what they're doing. If something happen to them they are fully responsible.
Hope I helped !