Need with this question .

which option accurately describes an unbalanced force?
1.three rows of cement blocks from a foundation for a house, and the house rests on its foundation.
2.the force of a house pressing down on its foundation of cement blocks is 3,000 n
3.each cement block supports a 2-n force, but when the foundation is built in a staggered pattern it can support 2,000 n
4.a 2-n force presses down on the cement block at the same time as a 1.5-n force presses up on the cement block

For a patient with the following pes statement and interventions, which would be the most appropriate monitoring and evaluating data? pes statement: inadequate calcium intake related to food and nutrition related knowledge deficit as evidenced by statements that the only dietary source of calcium is milk and she believes that she is lactose intolerant. patient’s nutrition prescription is for a diet providing 1200 mg calcium per day. patient was provided with in-depth nutrition education on alternative dietary and supplement sources of calcium. a. calcium intake (at subsequent visit) b. knowledge assessment by asking patient to identify food sources from menus and shopping list (at the end of the current visit) c. serum calcium (at next visit) d. both a and b e. both a and c