A. There is an uncommitted transaction that has modified some of the table blocks, causing some "cell single block physical reads" to be requested by the database instance, resulting in additional I/O for block in the cells.

B. The table is an IOT and has an overflow segment, causing "cell multiblock physical reads" to be requested by the database instance, resulting in additional I/O for block in the cells.

C. There are migrated rows in the table, causing some "cell single block physical reads" to be requested by the database instance, resulting in additional I/O for blocks in the cells.

D. The table is an indexed clustered table, causing "cell single block physical reads" to be requested by the database instance, resulting in additional I/O for blocks in the cells.

E. There is an index on the column used in the where clause, causing "cell multiblock physical reads" to be requested by the database instance, resulting in additional I/O for blocks in the cells.