Choose the correct option.

Keeping fit and staying healthy have become a growing industry. ... apart from the amount of money spent each year on doctors' ... and approved medical treatment, huge sums are now spent on health foods and ... of various kinds, from vitamin pills to mineral water, not to mention health clubs and keep-fit ... and videos. We are more concerned than ever, it seems, ... the water we drink and the air we beathe, and are smoking less, though not yet drinking less alcohol. This does not appear to mean that ... and sneezes have been banished, or that we can all expect to live to a hundred.
To give a personal example, one of my friends, who is a keep-fit ... , a non-smoker and teetotaller, and who is very ... about what he eats, is at present languishing in bed with a wrist in ... and a badly sprained ankle. Part of his healthy ... is to play squash every day after work.
He also cycles everywhere, and if you have ever tried to cycle through the rush-hour traffic with a sprained ankle, you will understand ... he acquired the broken wrist.