She had to work from … — choose the word or group of words that best completes each of the following sentences

Analyze the question: The sentence is "She had to work from ...." and we must choose the correct fixed expression for a time span.

Concept: In English, the idiomatic phrases "from morning till night," "from dawn to dusk," and "from morning till evening" are fixed expressions. They take no articles (no "the") before the nouns. When we speak generally about a span of time like this, the nouns morning and evening are used as bare nouns, just like in "from day to day" or "from head to toe."

Step-by-step check:

• A. morning till the evening: The article is used inconsistently, with none before "morning" and "the" before "evening." This is wrong.
• B. the morning till evening: Again inconsistent, with "the" before only the first noun. This is wrong.
• C. the morning till the evening: Grammatically possible in some contexts, but it is not the idiomatic fixed expression. It sounds unnatural for describing a work span in general.
• D. morning till evening: Both nouns are bare, which is the correct idiomatic form. ✔

Answer: D. She had to work from morning till evening.

Tip: For "from ... to/till ..." time expressions, drop the articles on both sides: from morning till night, from dawn to dusk, from start to finish, from Monday to Friday. If the options show articles mixed unevenly (like A and B), eliminate them first.