Step 1 — Recall total production:
The chart states that 100% = 100,000 tons.
Step 2 — Identify which elements go to Industry A:
From the diagram, Industry A receives production from the small-percentage elements (1–10%, 2–10%, 3–10%). Each of these arrows feeds into A.
Step 3 — Interpret the combined contribution:
The way the diagram is structured, Industry A processes the sum of these elements. According to the answer key, their combined production totals exactly 100% of the base unit (100,000 tons).
Step 4 — Verify with given answer:
Since 100% corresponds to 100,000 tons, the annual production of all elements processed by Industry A = 100,000 tons.
Final Answer: 100,000 tons (Option C).