Answer:
D
Step-by-step explanation:
Most say 60 seconds ( 1 minute ) a stretch will really improve flexibility. However holding a stretch for 15 seconds then pause for a breath or two then repeat for a total of 4 times equals 60( 1 minute ) seconds. Same with 30 seconds holding it 30 seconds then take a breath or two then do it one more time is also equal to 60 seconds ( 1 minutes) Hope this gives you a better understanding!