Which One of the Following Is True with Respect to Cell

Which one of the following is true with respect to cell phones and polling?

A) Pollsters have been contacting people on their cell phones since cell phones were first introduced.
B) By 2007, more than 85 percent of American homes possessed only cell phones.
C) It is doubtful polling organizations will contact people on their cell phones.
D) Cell phones are automatically disqualified from participation in scientific polls.
E) The first pollster did not contact people on cell phones until January 2008.