What Is the Relationship Between Shyness and Loneliness

What is the relationship between shyness and loneliness?  

A) People who have difficulty dealing with shyness often withdraw socially, and social withdrawal generally exacerbates matters and can lead to loneliness. 
B) People who are shy tend to gravitate towards other people who are shy, which creates a communication barrier, and ultimately, loneliness. 
C) Shy people typically move far away from their families and end up with poor social networks, exacerbating their loneliness. 
D) There is no relationship between shyness and loneliness.