Larry Sommers: Sue named him and her to chair the PR and planning committees, respectively.

Paula Presley: Second choice is B, but definitely not C (unless Sue named another person a desk!)

Yvonne Klein: simplicity, simplicity.

Tom Kreitzberg: That's about as ugly as it gets.

Jennifer German: Chair is gender neutral and less cumbersome than chairperson.

John David Lamb: I follow Barzun on this one.

John Russell: Calling me a chair doesn't make me one but calling me late for dinner makes me mad.

Yocheved Golani: Chair suffices on political correctness grounds, facilitates fewer keystrokes, is an economical turn of phrase and simply makes good sense.

Charlotte Fox Luttrell: Simple, avoids controversy. Chairperson is awkward and so-o-o 80's.

Mark H. Bloom: C or D are correct ... or maybe I've been on too many committees recently. I prefer the shorter term on principle.