Complete the sentence. after you have used context clues to determine the meaning of an unfamiliar word, you should replace the unfamiliar word with a synonym to see if the sentence makes sense. continue reading. think of an antonym for the unfamiliar word. look up the unfamiliar word in a dictionary to check its meaning.

D.  look up the unfamiliar word in a dictionary to check its meaning.

Context clues will always provide hints with regard to helping readers figure out what a word  or term means.  However, after figuring out what a word means based upon context clues (which should only be considered the first step), what you should do is look up the word in question.  This should be done so you could check your interpretation as well as help you commit the new word or term to memory.  

answer; (d) i believe the best answer is ; ///people said that man could not fly, but in 1903, orville and wilbur wright made the first sustained powered flight in a heavier- than-air machine;