Lady ada lovelace was a conceiving in the 1830s of mathematical programming used in prototype of the modern computer. a. ostensible b. vigilant c. repartee d. visionary

Which sentence is punctuated correctly? the shoes normally cost 40 dollars, however; we got them on sale. the shoes normally cost 40 dollars however we got them on sale. the shoes normally cost 40 dollars, however, we got them on sale. the shoes normally cost 40 dollars; however, we got them on sale.