20.
									
										Basal metabolic rate can be simply defined as
									
								
															
														
																									
										A:
											the rate at which your cardiovascular system uses energy 
									
																										
										B:
											the rate at which all your muscle, taken together, use energy on a daily basis 
									
																										
										C:
											the sum of all the essential energy needs for one’s body to function
									
																										
										D:
											 a rate of energy consumption that only applies to those who work out
									
																								 
							
																
									The answer is:
										C