What does it mean when someone is afraid of being tied down by marriage?

Based on the root word what is the definition of imperceptible

Read the excerpt from julius caesar, act 5, scene 5. brutus. why this, volumnius. the ghost of caesar hath appeared to me two several times by night—at sardis once, and this last night, here in philippi fields. i know my hour is come. volumnius. not so, my lord. brutus. nay, i am sure it is, volumnius. thou seest the world, volumnius, how it goes. our enemies have beat us to the pit, [low alarums] it is more worthy to leap in ourselves than tarry till they push us. which prediction about the plot does this passage most support? brutus will replace caesar. brutus will take his own life. brutus will surrender to his enemies. brutus will be forever haunted by caesar.

Which phrase from the poem "when you are old" leads the reader to infer that the subject was admired for her beauty by many, but only truly loved by him? a. "old and grey" b. "a little sadly" c. "their shadows deep" d. "with love false or true"