Select one option which shows the line number where selection is first used in the algorithm shown in Figure 1.

Figure 1

1      weight ← USERINPUT
2      category ← USERINPUT
3      base_price ← 5.0
4      IF weight > 10 THEN
5          base_price ← base_price + 3.5
6      ELSE IF weight > 5 THEN
7          base_price ← base_price + 1.5
8      ENDIF
9      FOR item ← 1 TO 3
10         IF category = 'express' THEN
11             base_price ← base_price * 1.2
12         ENDIF
13     ENDFOR
14     OUTPUT base_price