The instructions that tell the cell everything it needs to survive are located in the ribosome along with the genetic material in the nucleus. However, if you're looking for where the genetic information is primarily stored, it would be in the nucleus (not listed in your options). Ribosomes are responsible for synthesizing proteins based on the instructions encoded in the mRNA, which is transcribed from DNA in the nucleus.
Given your provided options, ribosome is the best choice, as it is the site of protein synthesis, which is crucial for cell function and survival.