Answer/explanation:
i mean it can be a good/positive attitude here are some examples:
Positive self-doubts can help you set personal goals or action plans.
Positive self doubts can maybe push you harder to do what you're doubting, work harder to burn body fat(if there is any), and just generally push you to finally being able to do what you're trying to achieve.
Finally, If you thing of doubt as <em>constructive, </em>to where you are telling yourself yeah, maybe i could work on this more as a person, i guess that could be another example.
that's all i got, hope it helped :)
The answer is A) On Our way to the beach, we had to stop and buy sunscreen.
Buoyancy was provided by huge tanks containing gasoline, which is lighter than seawater. The vessel hung beneath these tanks. Iron weights fixed to the outside of the hull by magnets were used as ballast, causing the bathyscaphe to descend.