__ is necessary for the existence of a healthy relationship

The answer is d because , safety almost always works, to prevent stds and pregnancy

Habit 1: be proactive  habit 2: begin with the end in mind  habit 3: put first things first  habit 4: think win-win  habit 5: seek first to understand, then to be understood  habit 6: synergize  habit 7: sharpen the saw 

This answer would be true

It is the toyota prius from a 2019 source, causing 111 accidents per 10,000 cars