Data sufficiency — How is P related to J? Statements: A. M is the brother of P and T is the sister of P. B. P's mother is married to J's husband, who has one son and two daughters. Identify which statements suffice to determine P's relation to J.

Introduction / Context:
We are to fix the relationship of P to J using minimal information. As a data-sufficiency item, we focus on whether the statements force a unique relation without overbuilding the tree.

Given Data / Assumptions:

• A: M is P’s brother; T is P’s sister (sibling set info; no mention of J).
• B: P’s mother is married to J’s husband, who has one son and two daughters.

Concept / Approach:
If “P’s mother is married to J’s husband” under standard monogamous interpretation, the only coherent reading is that J is P’s mother (J’s husband is P’s father, married to P’s mother). Thus P is the child of J.

Step-by-Step Solution:

Verification / Alternative check:
Any attempt to interpret B otherwise leads to polygamy or contradiction. The cleanest, standard reading is J = P’s mother.

Why Other Options Are Wrong:

• A alone: No J mentioned; cannot conclude.
• Either A or B: False, because A fails.
• Both not sufficient: False, B alone suffices.
• A and B together: Redundant; B already suffices.

Common Pitfalls:
Overcomplicating the phrase “P’s mother is married to J’s husband”; the intended inference is straightforward in standard family-logic settings.

Final Answer:
B alone is sufficient (P is J’s child).