Match the following.
| $1$. Spatial gap | a) Customers make their purchase at regular intervals, whereas production has to be organised on a continuous process |
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| $2$. Temporal gap | b) Consumers are usually scattered, whereas production is concentrated in a few centres |
| $3$. Perceptional gap | c) Customers cannot have full information of producers and products available, this prevents free exchanges |
| $4$. transactional gap | d) Manufactureres organise large-scale production, whereas customers prefer to buy only in small quantities |