Asymmetry of information??

Which of the following would NOT explain why the company faces capital rationing?

A.Asymmetry of information
B.Poor credit rating
C.Strict government monetary policy
D.Large proportion of tangible assets

Solution:
The correct answer is D.

Tangible assets provide good potential security for providers of debt finance.

I am confused between option A and D and I don’t understand what is asymmetry of information?

Kindly let me know. Thanks in advance!