The correct answer is D. Admittance.
The correct spelling of the word is "admittance". It is a noun that means the act of allowing someone to enter a place. It is derived from the Latin word "admittere", which means "to allow to enter".
The other words in the options are spelled correctly.
- Adulteration is the act of making something impure by adding inferior or harmful substances.
- Adulation is the act of praising someone or something excessively.
- Advancement is the act of moving forward or progressing.
