Which of the following would best describe the characteristics of covalent materials? Select one:
A. a. A brittle, transparent solid with a very high melting point.
B. b. A shiny, malleable solid with a very high melting point.
C. c. A non-conducting material with low melting and boiling points, likely liquid or gas at room temperature.
D. d. A brittle, opaque solid with a very high melting point.
E. e. A non-conducting solid at room temperature that will conduct if melted or dissolved.