Learn when/how to choose between answer choices D & E on GMAT Data Sufficiency questions. Expert GMAT instructor Brett Ethridge walks you through a sample GMAT data sufficiency question and explains an important tip for eliminating wrong answers on certain GMAT data sufficiency question types. These GMAT strategies will be applied to a GMAT geometry question involving circles (GMAT geometry). For more tips and strategies, visit www.dominatethegmat.com/blog.