Leticia has worked for 10 years in the public relations department of a large firm. she has not been promoted to any executie position in her firm even though she has directed several successful projects for the firm. her lack of promotion is an example of:
the "grass ceiling"
the "crystal palace"
the "mommy track"
sexual harrasment

Her lack of promotion is an example of the "glass ceiling." You misspelled this option - it is glass, not grass.
Glass ceiling refers to some kind of a metaphorical barrier that prevents mostly women and minorities from being promoted. 
The "crystal palace" isn't a term. The "mommy track" has to do with the fact that a woman may become a mother at some point and then her job may pay the price. Sexual harassment is obviously a wrong choice.