Which statement best describes the relationship between heart rate and time during exercise?
a) the heart rate increases for 6 minutes, remains constant for 19 minutes, and then gradually increases for 5 minutes.
the heart rate decreases for 6 minutes, remains constant for 19 minutes, and then gradually increases for 5 minutes.
the heart rate increases for 6 minutes, remains constant for 19 minutes, and then gradually decreases for 5 minutes.
d)the heart rate remains constant for 6 minutes, increases for 19 minutes, and then gradually decreases for 5 minutes.

Subject: save the whales! dear professor crest, i know you are really busy and everything, but i was hoping that you could spend more time thinking about how to save the whales. it’s up to us to speak up on their behalf. it’s really wrong that some amusement parks use these poor, defenseless animals for recreational purposes. this must be stopped, and you’re the person to do it! ttyl, jules which revisions would make this e-mail more formal? check all that apply. a. removing the contractions b. removing the exclamation points c. removing the salutation d. removing the slang and casual speech e. removing the information about amusement parks