A Homeschooled Child Recently Visited an Ailing Great-Grandparent Who Was

A homeschooled child recently visited an ailing great-grandparent who was complaining of a painful rash.Even though the child had had no contact with children suffering from chickenpox,the child developed chickenpox.How did the child contract the infection?

A) The virus was likely contracted from fomites.
B) The adult had chickenpox and exposed the child.
C) An insect vector infected the child.
D) The adult had shingles and the child was exposed to virus particles.
E) There is insufficient information for a conclusion.