Which of the following strategies is considered to be healthy and effective in promoting weight loss and weight maintenance? select all that apply.
- strict attention to portion control
- consumption of 4 - 5 smaller meals and snack
- combination of behavioral therapy with dietary and activity changes

All the strategies mentioned are considered to be healthy and effective in promoting weight loss and weight maintenance.

Explanation:

Regarding weight loss and weight maintenance all the optiones considered are effective. However, some of them are more usefull tan others. Strict attention to portion control is effective. Nevertheless, it is inadequate as the only method to try. Consumption of 4 - 5 smaller meals and snack is, again usefull, but it has to be considered with some other behavioral changes as physical activity. That's why of all the options, "combination of behavioral therapy with dietary and activity changes" becomes the best strategy, because we can admit it includes the previous ones.

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