Concept:The stress in a word falls on the syllable that is pronounced with the greatest emphasis or loudness.Explanation:The word "defensible" is pronounced as de-FEN-si-ble.The second syllable "FEN" receives the strongest stress.Among the given options, only option B shows the stress mark on this syllable.Therefore, the correct stress pattern is de-FEN-si-ble.Answer:B. de-FEN-si-ble