Find the part containing the error; if the sentence is correct, choose ‘‘No error.’’ Sentence: When I stood up spontaneously and questioned the speaker; someone commented that it was a boldly step.

Introduction / Context:
This question checks adjective vs. adverb usage before a noun. We use adjectives to modify nouns; adverbs modify verbs/adjectives/other adverbs.

Given Data / Assumptions:

• Noun phrase: ‘‘a … step’’ requires an adjective before ‘‘step.’’
• Given word: ‘‘boldly’’ (adverb) is used attributively.
• Minor punctuation issue: a semicolon after a dependent clause is also awkward but not offered as an option separate from B.

Concept / Approach:
Use the adjective ‘‘bold’’ before ‘‘step.’’ The adverb ‘‘boldly’’ would be correct if it modified a verb, e.g., ‘‘He spoke boldly.’’

Step-by-Step Solution:
Identify modifier type: before a noun → adjective required.Replace ‘‘boldly’’ with ‘‘bold.’’Corrected phrase: ‘‘… it was a bold step.’’

Verification / Alternative check:
Try switching the noun: ‘‘a quickly decision’’ vs ‘‘a quick decision’’—the former sounds wrong for the same reason.

Why Other Options Are Wrong:
A and C are fine. B has a punctuation quirk, but the clear grammatical error targeted here is in D (word form).

Common Pitfalls:
Using adverbs where adjectives are required; ignoring part-of-speech roles in noun phrases.

Final Answer:
it was a boldly step.