Select the most appropriate option to fill in blank number 1.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4, i.e., delivery.
Filler Concept: Appropriate noun related to common challenges in e-commerce.
Explanation: The sentence talks about the historical struggles of the e-commerce industry. One of the most common and logical problems in this field is delivery issues, such as delays or logistics problems.
Final Sentence: First, the e-commerce industry has historically struggled with delivery issues.
Conclusion: "Delivery" is the most contextually appropriate word that fits the challenges mentioned.