User john updates some rows and asks user damir to log in and check the changes before he commits them. which of the following statements is true?
a. damir can see the changes but cannot alter them because john will have locked the rows.
b. damir will not be able to see the changes.
c. john must commit the changes, so that damir can see them and if necessary roll them back.
d. none of the above

Jaina and tomas are being considered as new tenants in an apartment. the landlord looks at their creditworthiness because he wants to be sure his new tenant pays the rent on time and in full. the table below summarizes the information that was on their applications. application information questions jaina tomas how many years have you had your job? 5 2 what is your monthly salary? $1,850 $2,500 how many credit cards do you have? 4 1 how much debt do you have? $13,000 $7,000 how many times were you late with payments on credit cards in the past year? 5 1 who will the landlord decide to be more creditworthy and why? tomas because the ratio of his debt to income is less. jaina because she has had her job longer, which makes her look more stable. jaina because she has more credit cards available to her. tomas because he makes more money per month.