in covalent bonds, the atoms that form bonds\na become ions.\nb transfer electrons.\nc may both be the same…

in covalent bonds, the atoms that form bonds\na become ions.\nb transfer electrons.\nc may both be the same element.\nd all of the above
Answer
Brief Explanations:
In covalent bonds, atoms share electrons instead of transferring them to become ions. Atoms of the same element can form covalent bonds, for example, in $O_2$ where two oxygen atoms form a covalent bond.
Answer:
C. may both be the same element.