SPELLING — Identify the misspelled word among A–D. If all four are correctly spelled, choose E (All correct). Words: A) Boundary B) Exhibit C) Depresion D) Demonstration

Introduction / Context:
Double-letter control is a frequent source of spelling errors. This item places a single-s version against the required double-s in “depression.”

Given Data / Assumptions:

• “Boundary”: correct.
• “Exhibit”: correct.
• “Depresion”: suspect; likely “depression.”
• “Demonstration”: correct.

Concept / Approach:
The correct noun is “depression,” spelled d-e-p-r-e-s-s-i-o-n with double s. The provided “Depresion” omits one s, producing a nonstandard form.

Step-by-Step Solution:
1) Check base “depress.”2) Add nominal suffix “-ion” → “depression.”3) Confirm that double s persists.4) Validate that A, B, and D are standard spellings.

Verification / Alternative check:
Compare related forms: depressive, depressed—both keep the double s, reinforcing the pattern.

Why Other Options Are Wrong:
A, B, D: Correct spellings.E: Not applicable; C is misspelled.

Common Pitfalls:
Dropping one of the doubled consonants in nouns derived from verbs (press → pressure, depress → depression).

Final Answer:
Depresion → correct spelling is “depression”