Read the passage given below and answer the question that follows it.
The company’s coffee crop for $1998-99$ totalled $8,079$ tonnes, an all-time record. The increase over the previous year’s production of $5,830$ tonnes was $38.58$ percent. The previous highest crop was $6,089$ tonnes in $1970-71.$ The company had fixed a target of $8,000$ tonnes to be realized by the year $2000-01,$ and this has been achieved two years earlier, thanks to the emphasis laid on the key areas of irrigation, replacement of unproductive coffee bushes, intensive refilling and improved agricultural practices. It is now our endeavour to reach the target of $10,000$ tonnes in $2001-02.$
Which one of the following would contribute most to making the target of $10,000$ tonnes in $2001-02$ unrealistic?
- The potential of the productivity enhancing measures implemented up to now has been exhausted.
- The total company land under coffee has remained constant since $1969$ when an estate in the Nilgiri Hills was acquired.
- The sensitivity of the crop to climatic factors makes predictions about production uncertain.
- The target-setting procedures in the company had been proved to be sound by the achievement of the $8,000$ tonnes target.