What caused robert e lee to reject an offer to command the union army

a - the union was controlled by president jefferson davis.
b - virginia seceded from the union, joining the confederacy.
c - lee was previously committed to the confederacy.
d - lincoln and lee did not agree on the future of slavery.

Which of the following problems did shays rebellion show about the articles of confederation? a. there was no federal standing army b. states couldn’t create their own tax laws c. the federal government imposed too many taxes on states d. there was too much federal regulation of interstate commerce