Write correcto for the ones that are correct and the ones that are incorrect, replace with the correct term corresponding to the picture with the article ( el, la, los, las)

These objects represent mayan numerals. just like roman numerals, they are combined to symbolize a numeral and this enabled astronomers, scholars and architects to compute various equations yet it was also used by farmers and traders in their day to day transactions.

The answer is c because i looked it up