Can you please explain what your question is better?
A will be the answer because usually marking your exercise days will become a habit because lets say you would do a running exercise but you want to do it in a certain day well if you mark it on the calendar, it'll become a habit.
There never seems to be enough hours in the day
Short-term effects of smoking may include the following:
"<span>Addiction to nicotine and exposure to dangerous chemicals"
"</span><span>More breathing problems"
"</span><span>Shortness of breath, phlegm, and a coarse cough"
"</span><span>Impaired lung growth and function"
"</span><span>Bad breath, yellow teeth, and stained fingers"
"</span><span>Foul-smelling clothes and hair<span>2"
</span></span>
Long-term effects may include the following:
"<span>Addiction to nicotine and exposure to dangerous chemicals"
</span>
"<span>Lung, mouth, throat, kidney, and stomach cancers"
</span>
"<span>Heart disease"
</span>
"<span>Impaired immune systems"
"</span><span>Emphysema and other chronic diseases"
"</span><span>Shorter lifespan (up to 20 years shorter)<span>3"
Quoted answers are NOT mine! There's a reason why they're quoted.
All credits reserved to their owners.
Further information / my sources may be provided at:
https://www.parentfurther.com/content/risks-underage-tobacco-use
Please, if you or someone you know is smoking/just got into smoking. Please stop yourself/them. The effects can be catastrophic if not handled/stopped soon. </span></span>
Interval training involves answer A