I love riddles so much this is the second one i give to you guys here it is: what is in front of you but you can't see it

good luck ;)

Achange in any of the following factors will cause investment spending and aggregate demand to change excepta. the interest rate effect b. expected business conditionsc. real interest rate d. expected future returns created by new technology e. expected business taxes

Which excerpt from act iv of hamlet best provides evidence of the theme’s development?

The use of a beat or a rhythm to remember something is