**Core Concept**
Early strict toilet training can lead to alterations in bowel habits, potentially causing a range of gastrointestinal and behavioral issues in children. This phenomenon is often attributed to the introduction of bowel habits that are not developmentally appropriate, leading to conflicts between the child's natural bowel function and the imposed toilet training schedule.

**Why the Correct Answer is Right**
Encopresis, or the involuntary passage of stool in inappropriate settings, is a common outcome of early strict toilet training. This occurs when the child's bowel is forced to adapt to an unnatural schedule, resulting in constipation and subsequent overflow incontinence. The increased pressure on the rectal mucosa and the resultant discomfort can lead to a vicious cycle of constipation and encopresis. The child's natural bowel function is disrupted, and the imposed toilet training schedule can exacerbate this issue, making it challenging for the child to establish a normal bowel routine.

**Why Each Wrong Option is Incorrect**
**Option A:** Nocturnal enuresis, or bedwetting, is a distinct issue that primarily involves the bladder and is not directly related to toilet training. While toilet training may indirectly affect bladder control, nocturnal enuresis is a separate condition that requires separate management.
**Option C:** Night terror is a parasomnia disorder characterized by intense fear, confusion, or disorientation during sleep, and is not related to toilet training or bowel habits.
**Option D:** Temper tantrums can be a response to a variety of situations, including frustration, anger, or disappointment, but are not directly linked to toilet training or encopresis.

**Clinical Pearl / High-Yield Fact**
It's essential to recognize that every child develops at their own pace, and early strict toilet training can be counterproductive. A more effective approach is to establish a gentle, gradual toilet training routine that respects the child's natural bowel habits and allows for a smooth transition to independent toileting.

✓ Correct Answer: B. Encopresis