On January 1, Sam prepaid $1,200 towards insurance for one year. After half a year, he cancelled the insurance policy and received a refund for the remaining balance. By how much did Sam's net worth change from January to June? of Select one: O a. Net worth decreased by $1,200 b. Net worth did not change c. Net worth increased by $600 d. Net worth decreased by $600 O O O Quiz navigation Contact us