Final answer:
Maria walks 3 m north and then 4 m east. The total distance is 7 m and the displacement is 3 m to the east.
Step-by-step explanation:
To calculate the total distance and displacement of Maria, we need to consider the individual distances and directions of her walks. She walks 3 m north and then 4 m east. The total distance is the sum of the individual distances, which is 3 m + 4 m = 7 m. The displacement is the straight line distance from Maria's initial position to her final position, considering direction. Since she walks north and then east, the displacement is 4 m to the east. Therefore, the correct answer is (d) distance= 4m displacement= 3m.