2. Which happened FIRST in order of time? (a) Braille was invented. b) The flat-bottomed paper bag was invent c) Christmas tree lights were invented.

To determine which of the three inventions occurred first, let's look at the historical timelines for each: ### (a) **Braille was invented** - **Inventor:** Louis Braille - **Year:** 1824 - **Details:** Louis Braille developed the Braille system to provide a tactile writing method for visually impaired individuals, revolutionizing accessibility to written language. ### (b) **The flat-bottomed paper bag was invented** - **Inventor:** Margaret E. Knight - **Year:** 1871 - **Details:** Margaret E. Knight patented a machine that could produce flat-bottomed paper bags, making them more practical and stable compared to the previously round-bottomed versions. ### (c) **Christmas tree lights were invented** - **Inventor:** Edward H. Johnson - **Year:** 1882 - **Details:** Edward H. Johnson, an associate of Thomas Edison, developed the first set of electric Christmas tree lights, enhancing the decoration of holiday trees safely and beautifully. ### **Conclusion** Among the three, **Braille was invented first** in **1824**, followed by the flat-bottomed paper bag in **1871**, and then Christmas tree lights in **1882**. **Answer:** **a) Braille was invented** occurred first among the listed inventions.