Please choose the correct ending to complete the given sentence: Health: [header] How to change behavior [title] Set clear goals. [step] Make sure the behaviors you want to change are specific, measurable, and attainable. Give yourself some freedom in the goals you set.

Ending1: For example, if you plan to change 50% to 25% of your behaviors in 10 days, spend time setting goals. Say you want to change 10% to 100% of your behaviors in 15 days. Ending2: [substeps] Set firm and measurable goals with specific examples of consistently changing behavior. You should be clear about what your goals are as well as how you'll achieve them. Ending3: Be realistic, but set them measurable and attainable. For example, if you want to change eating habits, you may include a drastic increase in how much you eat. Ending4: [substeps] If you're trying to begin exercising for the first time, a reasonable goal might be to go for a 20-30 minute walk five days per week. This holds you accountable to walk more throughout the week, but is more gives you some wiggle room if something gets in your way.

Answer format: ending1/ending2/ending3/ending4