Read the following passage and mark the letter A, B, C, or D on your answer

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 34 to 38.
Keeping fit and healthy may seem difficult, but there are a few easy-to-follow guidelines. Firstly, a balanced diet (34)... means selecting food that is low in salt and sugar is absolutely essential. Experts recommend reducing the amount of fat in our diet, as too much can (35).... heart problems. Secondly, it is important to (36)... exercise into your daily routine. This can be done by simply walking as much as possible and climbing stairs instead of taking the lift. Exercise is necessary to maintain a healthy body, as well as increasing energy levels and making you feel generally fitter and happier.
Finally, staying relaxed is (37)...reason for good health. Too much stress can lead to a variety of illnesses, from headaches to high blood pressure. Whenever possible, do things you enjoy and treat yourself occasionally. (38)... the message is simple - enjoy yourself but learn to respect your body too. It's all a question of getting a balance right.
(Adapted from FCE Use of English)