Whcih of the following is not mentioned in the passage a major factor in Chieago‘s growth?

[চট্টগ্রাম বিশ্ববিদ্যালয় ভর্তি পরীক্ষা ২০১০-২০১১ ইউনিট-c : 2011]

1. new railroad lines

2. innovative farm equipment

3. increased water transportation networks

4. rising demand for the manufacture of explosives

5. the largest system of inland waterways

Answer

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