A very low horizontal speed is needed to drop down and break the block without hitting the corner to the left or the block above the bomb block. Or with Temporary Blue, Samus can bounce into the bomb block.

Requires:

{
  "notable": "Speedball"
}
"Morph"
{
  "obstaclesCleared": [
    "C"
  ]
}
{
  "obstaclesNotCleared": [
    "D"
  ]
}
{
  "or": [
    {
      "and": [
        "canSlowShortCharge",
        {
          "getBlueSpeed": {
            "usedTiles": 17,
            "openEnd": 0
          }
        },
        "canSpeedball"
      ]
    },
    {
      "and": [
        {
          "canShineCharge": {
            "usedTiles": 30,
            "openEnd": 1
          }
        },
        "canTemporaryBlue",
        "canLateralMidAirMorph"
      ]
    }
  ]
}

Clears obstacles: B