Your cardiovascular system gets better when you increase the time and intensity of your workouts. what should the word in italics be replaced with to make this sentence more precise? stronger and more efficient weaker and more intense faster and more important healthier and more frequent

What is difference between an epidemic and a pandemic? a) an epidemic is a disease; a pandemic is a treatment.b) an epidemic is restricted to a local region; a pandemic is global.c) an epidemic has low mortality; a pandemic has higher mortality.d) an epidemic is caused by a bacterial infection; a pandemic is caused by a viral infection.