Which of the following statements is $NOT$ consistent regarding the factors affecting the rate of photosynthesis?

• A
  Light saturation for $CO_2$ fixation occurs at $10\%$ of full sunlight.
• B
  An increase in atmospheric $CO_2$ concentration up to $0.05\%$ causes an increase in the rate of $CO_2$ fixation.
• C
  $C_3$ plants respond to higher temperatures with enhanced photosynthesis,while $C_4$ plants have a much lower optimum temperature.
• D
  Tomato is a greenhouse crop that can be grown in $CO_2$-enriched atmosphere for higher yields.