An alcohol (A) on heating with concentrated H₂SO₄ gives alkene (B), which shows geometrical isomerism. The compound (A) is:

A. (CH₃)₂C(OH)CH(CH₃)₂
B. (CH₃)₂C(OH)(CH₂CH₃
C. CH₃CH₂CH(OH)CH₃
D. All of the above