Layla it is A. that's the only one in standard form.

The carbon atom is unique among elements in its tendency to form extensive networks of covalent bonds not only with other elements but also with itself. ... Moreover, of all the elements in the second row, carbon has the maximum number of outer shell electrons (four) capable of forming covalent bonds.
Hope it helps uh ✌️✌️✌️
Gud mrng
Calcium is stored in bones in the body
The answer is A the heat is removed because it’s freezing and now the lemonade is frozen which makes a solid