Error Spotting – Identify the part of the sentence that contains a grammatical error (choose exactly one; select “No error” if the sentence is fully correct). Sentence: A) We will pack not only B) the material properly C) but will also deliver it D) to your valued customers.

Introduction:
This tests the parallel placement of the correlative pair "not only ... but also" with auxiliary verbs. Misplacement causes imbalance in structure and style.

Given Data / Assumptions:

• Auxiliary "will" is present in A and again in C.
• "not only" follows the main verb "pack" instead of the auxiliary "will."
• Goal: maintain parallelism across both correlated parts.

Concept / Approach:
When an auxiliary exists, place "not only" after the auxiliary for parallelism: "We will not only pack ... but also deliver ...". Repeating "will" in both halves is unnecessary if parallelism is maintained correctly.

Step-by-Step Solution:
1) Identify the auxiliary: "will."2) Check placement: "not only" should come after "will" to pair with "but also" smoothly.3) Current A says "We will pack not only," which breaks symmetry.4) Correct: "We will not only pack the material properly but also deliver it to your valued customers."

Verification / Alternative check:
Read aloud with corrected placement; rhythm and logical pairing become clear and concise.

Why Other Options Are Wrong:

• B: Object and adverb "properly" are fine.
• C: With the corrected A, repeating "will" is unnecessary but not strictly wrong; better style omits it.
• D: Prepositional phrase is idiomatic.

Common Pitfalls:
Letting "not only" drift after the main verb; duplicating auxiliaries and harming balance.

Final Answer:
Option A