In an Experimental Situation,a Student Researcher Inserts an MRNA Molecule

In an experimental situation,a student researcher inserts an mRNA molecule into a eukaryotic cell after she has removed its 5' cap and poly-A tail.Which of the following would you expect her to find?

A) The mRNA would not be transported out of the nucleus.
B) The cell recognizes the absence of the tail and adds a new poly-A tail to the mRNA.
C) The molecule is digested by restriction enzymes in the nucleus.
D) The molecule is degraded by hydrolytic enzymes because it is no longer protected at the 5' end and the 3' end.