Difficulty: Medium
Correct Answer: If statements I and III are sufficient while II is not required.
Explanation:
Introduction / Context:
We need the relative direction of D from B. In 2D direction questions, qualitative cardinal relations (north/south/east/west) often suffice without exact distances, as long as reference points connect B to D through consistent geometry.
Given Data / Assumptions:
Concept / Approach:
Combine statements that connect B–A–E–F–D to infer D’s bearing from B. Distances to G are extraneous unless they yield bearings, which they do not here.
Step-by-Step Solution:
From III: With B the midpoint of AE and A west of B, E must be east of B on the same horizontal line. Since F is south of E and D is west of F, D is somewhere southwest of E; relative to B (which is west of E), D ends up to the south and (typically) east/west depending on the offset.Use I to orient vertical relation: C north of D and A west of B. With A already west of B from III, the composite of I + III places D to the south relative to C while keeping the AE baseline horizontal through B. The construction constrains D to be south-west of B (west via “D west of F” and south via “F south of E,” with E east of B).Thus I + III together determine a fixed quadrant for D from B (south-west). Statement II adds a distance to an unrelated point G and does not refine the quadrant.
Verification / Alternative check:
Sketching consistent placements shows D must lie to the south-west of B using I + III; varying II does not change the direction.
Why Other Options Are Wrong:
I alone lacks linkage from D to B; III alone could allow ambiguous quadrants without the north/south tie from I; II is unnecessary.
Common Pitfalls:
Overvaluing raw distances without bearings; direction questions usually rely on relative placements.
Final Answer:
Statements I and III are sufficient; II is not required.
Discussion & Comments