D because it includes more information than the others and is more professional
"There's a fascinating psychological reason behind your belief in ghosts<span>. Halloween is a time to celebrate </span>ghosts<span>, vampires, and everything supernatural. ... More than a third of </span>people<span> surveyed also said they </span>believed in ghosts<span> or spirits returning from the dead."</span>
The most common way to start a sentence is with a subject, making the correct answer B.
An example would be a simple sentence "He broke the window" where "he" is the subject.
