Which of the Following Statements Is TRUE

Which of the following statements is TRUE?

A) Boron oxide, when added to silicon oxide glass, forms a more heat stable glass called Pyrex.
B) Boron most commonly forms compounds that fulfill the octet rule.
C) Boron forms fairly weak bonds with oxygen because of their large electronegativity difference.
D) Boron trichloride is an example of a strong Lewis base.
E) Boron is a typical gaseous nonmetallic element.