Which symptom is the main indication that a person is having a heart attack? A. sore arms
B. sudden pressure or pain in the chest
C. vomiting
D. shortness of breath

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 

1. a lack of knowledge